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EP0453460A1 - Process for disposing of varnish or paint sludges and waste products of colouring agents. - Google Patents

Process for disposing of varnish or paint sludges and waste products of colouring agents.

Info

Publication number
EP0453460A1
EP0453460A1 EP90901585A EP90901585A EP0453460A1 EP 0453460 A1 EP0453460 A1 EP 0453460A1 EP 90901585 A EP90901585 A EP 90901585A EP 90901585 A EP90901585 A EP 90901585A EP 0453460 A1 EP0453460 A1 EP 0453460A1
Authority
EP
European Patent Office
Prior art keywords
waste
coal dust
mixture
paint
ground
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90901585A
Other languages
German (de)
French (fr)
Other versions
EP0453460B1 (en
Inventor
Eckhard Weissflog
Joerg Demmich
Anton Naherm
Ulf Nagel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VW Kraftwerk GmbH
GFR Gesellschaft fuer die Aufbereitung und Verwertung von Reststoffen mbH
Original Assignee
VW Kraftwerk GmbH
GFR Gesellschaft fuer die Aufbereitung und Verwertung von Reststoffen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VW Kraftwerk GmbH, GFR Gesellschaft fuer die Aufbereitung und Verwertung von Reststoffen mbH filed Critical VW Kraftwerk GmbH
Priority to AT90901585T priority Critical patent/ATE85356T1/en
Publication of EP0453460A1 publication Critical patent/EP0453460A1/en
Application granted granted Critical
Publication of EP0453460B1 publication Critical patent/EP0453460B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the present invention relates to a process for the disposal of paint and color sludge and colorant waste, in particular from the automotive industry, but also from other branches of industry in which larger quantities of this problematic waste are produced and have hitherto only been able to be disposed of in special landfills to be spent.
  • the space in special landfills is limited and costly, so that there is an urgent need to avoid waste that could previously only be disposed of in special landfills or to dispose of it in an environmentally friendly manner with material / energy recovery.
  • Lacquer and color sludge but also colorant waste generally contain more or less large amounts of vaporizable solvents, more or less high polymer binders, inorganic and / or organic dyes and / or pigments. In many cases, they also contain not insignificant amounts of heavy metals, so that they can endanger the groundwater if not properly landfilled. Attempts to burn these problematic waste materials have so far failed because these waste materials are mostly viscous and sticky and cannot even be dissolved or suspended with the addition of other solvents to such an extent that they can be metered into the incineration plants without problems.
  • the object of the invention is to develop a process for the disposal of paint and color sludge and colorant waste, in particular from the automotive industry, which is generally applicable and leads to waste materials which can be disposed of easily and inexpensively.
  • This task can be solved surprisingly simply by grinding the waste and burning it together with at least the same amount of coal dust.
  • the wastes are only ground after the vaporizable solvents have been largely removed.
  • Evaporable solvents are generally only separated off if this is possible, for example by gentle heating and suction, if appropriate under reduced pressure, and the solvent vapors obtained can be easily recovered or burned without problems.
  • a preparation or recovery system for solvent vapors already exists, it can be useful and economical to separate evaporable solvents to a greater or lesser extent and thus to process them separately.
  • vaporizable solvents can also remain in the waste and be disposed of together with the other components of the paint and color sludge and colorant waste.
  • these ground waste materials are mixed and burned in a special embodiment with at least the same amount by weight of coal dust and optionally alkaline additives, preferably quicklime and / or limestone powder.
  • coal dust grades usually obtained in power plants can be used as coal dust. If desired, however, more intensive and finer grinding can also take place. The finer the coal dust, the greater the amount of evaporable solvent that can be bound by it.
  • Alkaline additives preferably quicklime and / or limestone powder
  • the amount of alkaline additives, preferably quicklime and / or limestone powder should be more than stoichiometric, based on the content of heavy metals and / or sulfur compounds, in order to ensure that these components are sufficiently incorporated in the ash and to escape Prevent components with the exhaust gases into the atmosphere.
  • the addition of quicklime is also recommended if the waste contains a considerable amount of water as a vaporizable solvent, since this can react with the quicklime when mixed and therefore no longer has to be bound by finely divided carbon.
  • the mixture of ground waste and coal dust and optionally alkaline additives preferably quicklime and / or limestone powder
  • These briquettes can be stored without any problems and can be burned directly in appropriate incineration plants if required. If it is intended to carry out the combustion in pulverized coal incineration plants, these briquettes can optionally be milled again. The resulting briquette dust can then be burned without any problems either on its own or in a mixture with further coal dust.
  • up to 50% by weight of the coal dust can be replaced in the mixture of ground waste and coal dust and optionally quicklime and / or limestone powder by finely divided substances from combustion plants which have an increased content of unburned carbon and / or free calcium oxide and / or unsintered clay minerals.
  • Such finely divided residues from incineration plants are themselves problematic and costly to dispose of. For example, ashes with an increased amount of unburned coal dust are unsuitable for use in the building materials industry. In the method according to the invention, this unburned carbon is fed back to an incineration plant and is even used to generate energy. Further problematic residues from incineration plants can be those which have a considerable proportion of free calcium oxide.
  • residues from dry additive processes there are qualities that are difficult or impossible to use in the building materials industry.
  • qualities that are difficult or impossible to use in the building materials industry are excellently suitable for use in the process according to the invention, in particular when it is necessary to add quicklime and / or limestone powder in order to be able to burn waste containing heavy metals and / or sulfur according to the invention.
  • residues from incineration plants with an increased content of unsintered clay minerals can also be used.
  • residues include, in particular, fluidized bed ash from coal with a high content of clay minerals. Such fluidized-bed pockets have hitherto not been usable or can only be used with difficulty.
  • the process according to the invention are capable of absorbing at least some of the liquid components of the waste when mixed and thereby facilitating the intermediate storage and, if appropriate, briquetting.
  • temperatures are so high that the absorbed components are released again and the proportions of clay minerals are sintered or melted.
  • the release of heavy metals during the combustion process is largely prevented by using the above-mentioned residues or other alkaline additives.
  • the heavy metals contained in the paint and paint sludge or paint waste are immobilized by glazing in the granulate.
  • the content of such problematic residues from incineration plants can be up to 50% by weight of the coal dust. If the content is higher, there is a risk that the mixtures according to the invention will no longer release enough energy during the combustion in order to ensure sufficiently high combustion temperatures. Although in many cases the addition of the same weight of coal dust to the waste is sufficient, it is advantageous for the reasons mentioned above that the mixture contains two to ten times the amount of coal dust based on the waste content. In particular with a higher content of coal dust in the mixture to be burned, problematic residues from incineration plants can also be used and disposed of according to the invention.
  • Lacquer sludge from an automobile factory was ground with liquid nitrogen under cooling and mixed with three times the amount of coal dust from the power plant and briquetted. Briquettes were easy to grind and could easily be burned.
  • Lacquer sludge from the metallic coating of an automobile factory was finely ground while cooling with liquid nitrogen and mixed with three times the amount of coal dust from the power plant mill and briquetted.
  • the briquettes were easy to grind and could be burned without problems.
  • 10% quicklime was added to the mixture. This mixture was also easy to briquette, grindable and combustible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing Of Solid Wastes (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Treatment Of Sludge (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Paints Or Removers (AREA)

Abstract

Ce procédé est destiné en particulier à l'industrie automobile. On broye les déchets, en séparant le cas échéant une grande partie des solvants évaporables, le cas échéant en les refroidissant, puis on les mélange avec une quantité en poids au moins égale de poudre de charbon et, le cas échéant, avec des produits d'addition alcalins, de préférence de la chaux vive et/ou de la poudre de pierre à chaux; finalement, on brûle le produit ainsi obtenu.This process is intended in particular for the automotive industry. The waste is crushed, separating, if necessary, a large part of the evaporable solvents, if necessary by cooling them, then they are mixed with an at least equal quantity by weight of coal powder and, where appropriate, with products of alkali addition, preferably quicklime and / or limestone powder; finally, the product thus obtained is burnt.

Description

verfahren zur Entsorcruncr von Lack- und Farbschlämmen sowie Farbmittelabfällen Process for the disposal of paint and color sludge and colorant waste
Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Entsorgung von Lack- und Farbschlämmen sowie Farb- mittelabfällen insbesondere aus der Automobilindustrie aber auch aus anderen Industriezweigen, in denen größere Mengen dieser problematischen Abfälle anfallen und bisher nur dadurch entsorgt werden können, daß sie auf Sonder¬ deponien verbracht werden. Bekanntlich ist der Raum in Sonderdeponien beschränkt und kostspielig, so daß ein dringendes Bedürfnis dafür besteht, bisher nur in Sonder¬ deponien entsorgbare Abfälle zu vermeiden bzw. sie unter stofflicher/energetischer Verwertung umweltverträglich zu beseitigen.The present invention relates to a process for the disposal of paint and color sludge and colorant waste, in particular from the automotive industry, but also from other branches of industry in which larger quantities of this problematic waste are produced and have hitherto only been able to be disposed of in special landfills to be spent. As is known, the space in special landfills is limited and costly, so that there is an urgent need to avoid waste that could previously only be disposed of in special landfills or to dispose of it in an environmentally friendly manner with material / energy recovery.
Lack- und Farbschlämme aber auch Farbmittelabfälle ent¬ halten im allgemeinen mehr oder weniger große Mengen verdampfbarer Lösungsmittel, mehr oder weniger hoσhpoly- mere Bindemittel, anorganische und/oder organische Farb- Stoffe und/oder Pigmente. In vielen Fällen enthalten sie auch noch nicht unerhebliche Mengen an Schwermetallen, so daß sie bei unsachgemäßer Deponierung das Grundwasser gefährden können. Versuche, diese problematischen Abfall¬ stoffe zu verbrennen, sind bisher daran gescheitert, daß diese Abfallstoffe meist zäh und klebrig sind und nicht einmal unter Zusatz von weiteren Lösungsmitteln soweit gelöst oder suspendiert werden können, daß sie problemlos in die Verbrennungsanlagen eindosiert werden können. Weiterhin entstehen bei der Verbrennung meist problema- tische und nur schwer zu reinigende Abgase, so daß dieser Weg der Entsorgung als ungeeignet erschien und nur in Sonderfällen einheitlicher und unproblematischer Zusammen¬ setzung zur Anwendung gekommen ist. Die Erfindung hat sich die Aufgabe gestellt, ein Ver¬ fahren zur Entsorgung von Lack- und Farbschlämmen sowie Farbmittelabfällen insbesondere aus der Automobil¬ industrie zu entwickeln, welches allgemein anwendbar ist und zu Abfallstoffen führt, die unproblematisch und preis¬ wert entsorgt werden können.Lacquer and color sludge but also colorant waste generally contain more or less large amounts of vaporizable solvents, more or less high polymer binders, inorganic and / or organic dyes and / or pigments. In many cases, they also contain not insignificant amounts of heavy metals, so that they can endanger the groundwater if not properly landfilled. Attempts to burn these problematic waste materials have so far failed because these waste materials are mostly viscous and sticky and cannot even be dissolved or suspended with the addition of other solvents to such an extent that they can be metered into the incineration plants without problems. Furthermore, the combustion produces mostly problematic and difficult-to-clean exhaust gases, so that this method of disposal appeared to be unsuitable and was only used in special cases with a uniform and unproblematic composition. The object of the invention is to develop a process for the disposal of paint and color sludge and colorant waste, in particular from the automotive industry, which is generally applicable and leads to waste materials which can be disposed of easily and inexpensively.
Diese Aufgabe kann überraschend einfach dadurch gelöst werden, daß die Abfälle vermählen und mit mindestens der gleichen Gewichtsmenge Kohlenstaub vermischt verbrannt werden.This task can be solved surprisingly simply by grinding the waste and burning it together with at least the same amount of coal dust.
In einer besonderen Ausführungsform des erfindungsge- mäßen Verfahrens werden die Abfälle erst nach weitgehen¬ der Abtrennung der verdampfbaren Lösungsmittel vermählen.In a special embodiment of the method according to the invention, the wastes are only ground after the vaporizable solvents have been largely removed.
Eine Abtrennung verdampfbarer Lösungsmittel erfolgt im allgemeinen nur dann, wenn dies beispielsweise durch leichtes Erwärmen und Absaugen gegebenenfalls unter ver¬ mindertem Druck möglich ist und die dabei anfallenden Lösungsmitteldämpfe ohne weiteres zurückgewonnen oder problemlos verbrannt werden können. Insbesondere wenn bereits eine Aufbereitungs- oder Rückgewinnungsanläge für Lösungsmitteldämpfe vorhanden ist, kann es sinnvoll und wirtschaftlich sein, verdampfbare Lösungsmittel mehr oder weniger weitgehend abzutrennen und somit separat aufzuarbeiten. Erfindungsgemäß können aber auch verdampf- bare Lösungsmittel in den Abfällen verbleiben und zu- sam en mit den übrigen Komponenten der Lack- und Farb¬ schlämme sowie Farbmittelabfälle entsorgt werden.Evaporable solvents are generally only separated off if this is possible, for example by gentle heating and suction, if appropriate under reduced pressure, and the solvent vapors obtained can be easily recovered or burned without problems. In particular, if a preparation or recovery system for solvent vapors already exists, it can be useful and economical to separate evaporable solvents to a greater or lesser extent and thus to process them separately. According to the invention, however, vaporizable solvents can also remain in the waste and be disposed of together with the other components of the paint and color sludge and colorant waste.
Insbesondere wenn der Gehalt an verdampfbaren Lösungs¬ mitteln relativ hoch ist und auch die übrigen Komponen¬ ten zu besonders klebrigen und zähen Abfällen führen. muß das Vermählen unter Kühlung erfolgen. Als besonders geeignet hat sich die Kühlung der Abfälle mit flüssigem Stickstoff erwiesen. Alle bisher untersuchten Lack- und Farbschlämme aus der Automobilindustrie konnten zumindest unter Kühlung mit Stickstoff problemlos ausreichend fein vermählen werden.Especially when the content of vaporizable solvents is relatively high and the other components also lead to particularly sticky and viscous waste. the grinding must take place with cooling. Cooling the waste with liquid nitrogen has proven to be particularly suitable. All of the paint and paint sludges from the automotive industry that have been examined so far could be finely ground without problems, at least with nitrogen cooling.
Erfindungsgemäß werden diese vermahlenen Abfallstoffe in einer besonderen Ausführungsform mit mindestens der gleichen Gewichtsmenge Kohlenstaub sowie gegebenenfalls alkalischen Zuschlagstoffen, vorzugsweise Branntkalk und/oder Kalksteinmehl vermischt und verbrannt.According to the invention, these ground waste materials are mixed and burned in a special embodiment with at least the same amount by weight of coal dust and optionally alkaline additives, preferably quicklime and / or limestone powder.
Als Kohlenstaub können die üblicherweise in Kraftwerken anfallenden Kohlenstaubqualitäten verwendet werden. Ge- wünschtenfalls kann aber auch eine intensivere und feinere Vermahlung erfolgen. Je feinteiliger der Kohlen¬ staub ist, um so größere Mengen an verdampf aren Lösungs- mittein können durch ihn gebunden werden.The coal dust grades usually obtained in power plants can be used as coal dust. If desired, however, more intensive and finer grinding can also take place. The finer the coal dust, the greater the amount of evaporable solvent that can be bound by it.
Der Zusatz an alkalischen Zuschlagstoffen, vorzugsweise Branntkalk und/oder Kalksteinmehl erfolgt insbesondere dann, wenn die Abfallstoffe, Schwermetalle und/ oder Schwefelverbindungen enthalten. Die Menge an alkalischen Zuschlagstoffen, vorzugsweise Branntkalk und/oder Kalk¬ steinmehl sollte, bezogen auf den Gehalt an Schwer¬ metallen und/oder Schwefelverbindungen überstöchiome- trisch sein, um eine ausreichende Einbindung dieser Komponenten in der Asche zu gewährleisten und ein Ent¬ weichen dieser Komponenten mit den Abgasen in die Atmosphäre zu unterbinden. Der Zusatz von Branntkalk empfiehlt sich auch dann, wenn die Abfälle als verdampf- bare Lösungsmittel erhebliche Mengen Wasser enthalten, da dieses beim Vermischen mit dem Branntkalk reagieren kann und somit nicht mehr durch feinteiligen Kohlenstoff gebunden werden muß. Gemäß einer bevorzugten Ausgestaltung des Verfahrens wird das Gemisch aus vermahlenen Abfällen und Kohlen¬ staub sowie gegebenenfalls alkalischen Zuschlagstoffen, vorzugsweise Branntkalk und/oder Kalksteinmehl briket¬ tiert. Diese Briketts sind problemlos lagerfähig und können bei Bedarf in entsprechenden Verbrennungsanlagen direkt verbrannt werden. Sofern beabsichtigt ist, die Verbrennung in Kohlenstaubverbrennungsanlagen durchzu¬ führen, können diese Briketts gegebenfalls erneut ver¬ mählen werden. Der dabei anfallende Brikettstaub kann dann für sich allein oder im Gemisch mit weiterem Kohlen¬ staub problemlos verbrannt werden.Alkaline additives, preferably quicklime and / or limestone powder, are added in particular when the waste materials contain heavy metals and / or sulfur compounds. The amount of alkaline additives, preferably quicklime and / or limestone powder, should be more than stoichiometric, based on the content of heavy metals and / or sulfur compounds, in order to ensure that these components are sufficiently incorporated in the ash and to escape Prevent components with the exhaust gases into the atmosphere. The addition of quicklime is also recommended if the waste contains a considerable amount of water as a vaporizable solvent, since this can react with the quicklime when mixed and therefore no longer has to be bound by finely divided carbon. According to a preferred embodiment of the method, the mixture of ground waste and coal dust and optionally alkaline additives, preferably quicklime and / or limestone powder, is briquetted. These briquettes can be stored without any problems and can be burned directly in appropriate incineration plants if required. If it is intended to carry out the combustion in pulverized coal incineration plants, these briquettes can optionally be milled again. The resulting briquette dust can then be burned without any problems either on its own or in a mixture with further coal dust.
Gemäß einer weiteren Ausgestaltung des Oberbegriffs des erfindungsgemäßen Verfahrens kann in dem Gemisch aus vermahlenem Abfällen und Kohlenstaub sowie gegebenenfalls Branntkalk und/oder Kalksteinmehl bis zu 50 Gew.-% des Kohlenstaubs ersetzt werden durch feinteilige Stoffe aus Verbrennungsanlagen, welche einen erhöhten Gehalt an unverbranntem Kohlenstoff und/oder freiem Calciumoxid und/oder ungesinterten Tonmineralien aufweisen. Derar¬ tige feinteilige Reststoffe aus Verbrennungsanlagen sind ihrerseits nur problematisch und kostspielig zu ent¬ sorgen. Beispielsweise sind Aschen mit einem erhöhten Gehalt an unverbranntem Kohlenstaub ungeeignet, in der Baustoffindustrie eingesetzt zu werden. Bei dem erfin¬ dungsgemäßen Verfahren wird dieser unverbrannte Kohlen¬ stoff erneut einer Verbrennungsanlage zugeführt und dabei sogar zur Energiegewinnung mitherangezogen. Weitere pro¬ blematische Reststoffe aus Verbrennungsanlagen können solche sein, die einen erheblichen Anteil an freiem Calciumoxid aufweisen. Es handelt sich hierbei insbe¬ sondere um Rückstände aus Trockenadditivverfahren. Auch hierbei fallen Qualitäten an, die nicht oder nur schwer in der Baustoffindustrie eingesetzt werden können. Gerade durch ihren Gehalt an freiem Calciumoxid sind sie hin¬ gegen ausgezeichnet geeignet, beim erfindungsgemäßen Verfahren eingesetzt zu werden, insbesondere wenn es sowieso notwendig ist, Branntkalk und/oder Kalksteinmehl zuzumischen, um schwermetallhaltige und/oder schwefel¬ haltige Abfälle erfindungsgemäß verbrennen zu können. Schließlich können auch Reststoffe aus Verbrennungsan¬ lagen mit einem erhöhten Gehalt an ungesinterten Ton¬ mineralien eingesetzt werden. Zu diesen Reststoffen zählen insbesondere Wirbelschichtaschen aus Kohlen mit einem hohen Gehalt an Tonmineralien. Derartige Wirbel¬ schichtaschen sind bisher nicht oder nur schwierig ver¬ wertbar. Beim erfindungsgemäßen Verfahren sind sie in der Lage, zumindest einen Teil der flüssigen Komponenten der Abfälle beim Vermischen absorptiv zu binden und da¬ durch die Zwischenlagerung sowie gegebenenfalls Brikettie¬ rung zu erleichtern. Bei der anschließenden erfindungs¬ gemäßen Verbrennung entstehen so hohe Temperaturen, daß die absorbierten Komponenten wieder abgegeben und die Anteile an Tonmineralien gesintert beziehungsweise auf¬ geschmolzen werden. Darüber hinaus wird durch Verwendung der oben genannten Reststoffe bzw. anderer alkalischer Zuschläge die Freisetzung von Schwermetallen beim Ver- brennungsprozeß weitgehend verhindert. Insbesondere bei Schmelzkammerfeuerungen werden damit die in den Lack- und Farbschlämmen bzw. Farbmittelabfällen enthaltenen Schwermetalle durch Verglasung im Granulat immobili¬ siert.According to a further embodiment of the preamble of the method according to the invention, up to 50% by weight of the coal dust can be replaced in the mixture of ground waste and coal dust and optionally quicklime and / or limestone powder by finely divided substances from combustion plants which have an increased content of unburned carbon and / or free calcium oxide and / or unsintered clay minerals. Such finely divided residues from incineration plants are themselves problematic and costly to dispose of. For example, ashes with an increased amount of unburned coal dust are unsuitable for use in the building materials industry. In the method according to the invention, this unburned carbon is fed back to an incineration plant and is even used to generate energy. Further problematic residues from incineration plants can be those which have a considerable proportion of free calcium oxide. These are, in particular, residues from dry additive processes. Here, too, there are qualities that are difficult or impossible to use in the building materials industry. Just on the other hand, due to their free calcium oxide content, they are excellently suitable for use in the process according to the invention, in particular when it is necessary to add quicklime and / or limestone powder in order to be able to burn waste containing heavy metals and / or sulfur according to the invention. Finally, residues from incineration plants with an increased content of unsintered clay minerals can also be used. These residues include, in particular, fluidized bed ash from coal with a high content of clay minerals. Such fluidized-bed pockets have hitherto not been usable or can only be used with difficulty. In the process according to the invention, they are capable of absorbing at least some of the liquid components of the waste when mixed and thereby facilitating the intermediate storage and, if appropriate, briquetting. In the subsequent combustion according to the invention, temperatures are so high that the absorbed components are released again and the proportions of clay minerals are sintered or melted. In addition, the release of heavy metals during the combustion process is largely prevented by using the above-mentioned residues or other alkaline additives. In particular in melting chamber furnaces, the heavy metals contained in the paint and paint sludge or paint waste are immobilized by glazing in the granulate.
Der Gehalt an derartigen problematischen Reststoffen aus Verbrennungsanlagen kann bis zu 50 Gew.-% des Kohlen¬ staubs betragen. Bei einem höheren Gehalt besteht das Risiko, daß die erfindungsgemäßen Gemische bei der Ver¬ brennung nicht mehr genügend Energie freisetzen, um aus¬ reichende hohe Verbrennungstemperaturen zu gewährleisten. Obwohl in vielen Fällen bereits der Zusatz der gleichen Gewichtsmenge Kohlenstaub zu den Abfällen ausreicht, ist es aus den oben genannten Gründen vorteilhaft, daß das Gemisch bezogen auf den Gehalt an Abfällen die zwei- bis zehnfache Menge Kohlenstaub enthält. Insbesondere bei höherem Gehalt an Kohlenstaub in dem zu verbrennenden Gemisch können erfindungsgemäß auch problematische Rest¬ stoffe aus Verbrennungsanlagen mitverwendet und mitent¬ sorgt werden.The content of such problematic residues from incineration plants can be up to 50% by weight of the coal dust. If the content is higher, there is a risk that the mixtures according to the invention will no longer release enough energy during the combustion in order to ensure sufficiently high combustion temperatures. Although in many cases the addition of the same weight of coal dust to the waste is sufficient, it is advantageous for the reasons mentioned above that the mixture contains two to ten times the amount of coal dust based on the waste content. In particular with a higher content of coal dust in the mixture to be burned, problematic residues from incineration plants can also be used and disposed of according to the invention.
Das erfindungsgemäße Verfahren ist in den nachfolgenden Beispielen näher erläutert.The process according to the invention is explained in more detail in the examples below.
B e i s p i e lExample
Lackschlamm aus einer Automobilfabrik wurde unter Küh¬ lung mit flüssigem Stickstoff vermählen und mit der drei- fachen Menge Kohlenstaub aus dem Kraftwerk vermischt und brikettiert. Es entstanden gut aufmahlbare Briketts, die sich problemlos verbrennen ließen.Lacquer sludge from an automobile factory was ground with liquid nitrogen under cooling and mixed with three times the amount of coal dust from the power plant and briquetted. Briquettes were easy to grind and could easily be burned.
B e i s p i e l 2Example: 2
Lackschlamm aus der Metallic-Lackierung einer Automobil¬ fabrik wurde unter Kühlung mit flüssigem Stickstoff fein vermählen und mit der dreifachen Menge Kohlenstaub aus der Kraftwerksmühle vermischt und brikettiert. Die Bri¬ ketts waren gut aufmahlbar und konnten problemlos ver¬ brannt werden. In einem weiteren Versuch wurde dem Ge¬ misch 10 % Branntkalk zugemischt. Auch dieses Gemisch war gut brikettierbar, aufmahlbar und verbrennbar. B e i s p i e l 3Lacquer sludge from the metallic coating of an automobile factory was finely ground while cooling with liquid nitrogen and mixed with three times the amount of coal dust from the power plant mill and briquetted. The briquettes were easy to grind and could be burned without problems. In a further experiment, 10% quicklime was added to the mixture. This mixture was also easy to briquette, grindable and combustible. Example 3
Eine andere Qualität eines Lackschlammes, der sich auch ohne Kühlung bei Raumtemperatur zerkleinern bzw. ver- mischen ließ, wurde mit der dreifachen Menge Kohlenstaub aus der Kohlenmühle und 20 % Calciumoxid vermischt und brikettiert. Während des Mischens wurde eine deutliche Temperaturerhöhung beobachtet, die auf die Umsetzung von Calciumoxid mit dem Wassergehalt des Lackschlamms und des Kohlenstaubs zurückzuführen war. Auch die so erhalte¬ nen Briketts waren gut aufmahlbar und konnten problemlos verbrannt werden. Another quality of a paint sludge, which could be shredded or mixed without cooling at room temperature, was mixed with three times the amount of coal dust from the coal mill and 20% calcium oxide and briquetted. A significant increase in temperature was observed during the mixing, which was due to the reaction of calcium oxide with the water content of the paint sludge and the coal dust. The briquettes thus obtained were also easy to grind and could be burned without problems.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zur Entsorgung von Lack- und Farbschlämmen sowie Farbmittelabfällen insbesondere aus der Auto- mobilindustrie, dadurch gekennzeichnet, daß die Ab¬ fälle vermählen und mit mindestens der gleichen Ge¬ wichtsmenge Kohlenstaub vermischt verbrannt werden.1. A process for the disposal of paint and paint sludge and colorant waste, in particular from the automotive industry, characterized in that the waste grind and burned mixed with at least the same weight amount of coal dust.
2. Verfahren gemäß dem Oberbegriff des Anspruchs 1, dadurch gekennzeichnet, daß in dem Gemisch bis zu 50 Gew.-% des Kohlenstaubs ersetzt wird durch fein¬ teilige Reststoffe aus Verbrennungsanlagen, welche einen erhöhten Gehalt an unverbranntem Kohlenstoff und/ oder freiem Calciumoxid und/oder ungesinterten Tonmineralien aufweisen.2. The method according to the preamble of claim 1, characterized in that in the mixture up to 50 wt .-% of the coal dust is replaced by finely divided residues from combustion plants which have an increased content of unburned carbon and / or free calcium oxide and / or unsintered clay minerals.
3. Verfahren gemäß Anspruch 1 oder 2, dadurch gekenn¬ zeichnet, daß das Gemisch aus vermahlenen Abfällen und Kohlenstaub brikettiert wird.3. The method according to claim 1 or 2, characterized gekenn¬ characterized in that the mixture of ground waste and coal dust is briquetted.
4. Verfahren gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Gemisch bezogen auf den Ge¬ halt an Abfällen die zwei- bis zehnfache Menge Kohlen¬ staub enthält.4. The method according to any one of claims 1 to 3, characterized in that the mixture based on the Ge content of waste contains two to ten times the amount of coal dust.
5. Verfahren gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Gemisch zusätzlich alkalische Zuschlagstoffe, vorzugsweise Branntkalk und/oder Kalksteinmehl enthält.5. The method according to any one of claims 1 to 4, characterized in that the mixture additionally contains alkaline additives, preferably quicklime and / or limestone powder.
6. Verfahren gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das brikettierte Gemisch erneut vermählen wird. 6. The method according to any one of claims 1 to 5, characterized in that the briquetted mixture is ground again.
7. Verfahren gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Abfälle unter Kühlung ver¬ mählen werden.7. The method according to any one of claims 1 to 6, characterized in that the waste is ground with cooling.
8. Verfahren gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Abfälle erst nach weitgehen¬ der Abtrennung der verdampfbaren Lösungsmittel ver¬ mählen werden. 8. The method according to any one of claims 1 to 7, characterized in that the wastes are milled only after the extensive separation of the evaporable solvents.
EP90901585A 1989-01-10 1990-01-05 Process for disposing of varnish or paint sludges and waste products of colouring agents Expired - Lifetime EP0453460B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90901585T ATE85356T1 (en) 1989-01-10 1990-01-05 DISPOSAL PROCEDURES FOR PAINT AND PAINT SLUDGE AND PAINT WASTE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3900482A DE3900482C1 (en) 1989-01-10 1989-01-10
DE3900482 1989-01-10

Publications (2)

Publication Number Publication Date
EP0453460A1 true EP0453460A1 (en) 1991-10-30
EP0453460B1 EP0453460B1 (en) 1993-02-03

Family

ID=6371793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901585A Expired - Lifetime EP0453460B1 (en) 1989-01-10 1990-01-05 Process for disposing of varnish or paint sludges and waste products of colouring agents

Country Status (7)

Country Link
EP (1) EP0453460B1 (en)
JP (1) JPH04505627A (en)
BR (1) BR9007012A (en)
DD (1) DD291617A5 (en)
DE (2) DE3900482C1 (en)
ES (1) ES2038053T3 (en)
WO (1) WO1990008178A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3924312C2 (en) * 1989-07-22 1994-06-09 Gfr Aufbereitung Reststoffe Process and device for recycling residues, paint and paint sludges
NL9002193A (en) * 1990-10-09 1992-05-06 Leto Recycling Bv METHOD AND APPARATUS FOR PROCESSING WASTE.
DE4331674C1 (en) * 1993-09-17 1995-01-26 Herberts Gmbh Process for the preparation of aqueous coating compositions involving the recycling of paint sludge; the coating compositions obtained in this process, and the use thereof
DE4340513C2 (en) * 1993-11-27 2000-09-21 Ver Verwertung Und Entsorgung Process for the preparation of residues for subsequent recycling and device for carrying out the process
DE19512550C1 (en) * 1995-04-06 1996-06-20 Lindemann Maschfab Gmbh Method and device for processing containers
DE60028250D1 (en) * 1999-12-30 2006-06-29 Gert Hjort Jensen PROCESS FOR USE OF POWDER MATERIALS
US8057556B2 (en) * 2007-01-23 2011-11-15 Citibank, N.A. Processing paint sludge to produce a combustible fuel product
JP5456341B2 (en) * 2009-03-17 2014-03-26 太平洋セメント株式会社 Method for producing waste oil-based solid fuel and method for using the waste oil-based solid fuel

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Publication number Priority date Publication date Assignee Title
DE1471600A1 (en) * 1963-07-23 1969-04-10 Oel Werk Tedden Gmbh Process for converting the acidic, resinous residues resulting from the refining of hydrocarbons with sulfuric acid into flammable substances
DE2451038C2 (en) * 1974-10-26 1982-11-18 Vereinigte Flugtechnische Werke Gmbh, 2800 Bremen Process for the environmentally friendly disposal of organic waste and / or residues of animal origin
DE2935103C2 (en) * 1979-08-30 1987-03-26 Estermann, Thomas M., Gempen, Basel Use of liquid or viscous industrial waste as an additional fuel in industrial combustion processes

Non-Patent Citations (1)

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Title
See references of WO9008178A1 *

Also Published As

Publication number Publication date
DD291617A5 (en) 1991-07-04
ES2038053T3 (en) 1993-07-01
DE3900482C1 (en) 1990-02-22
EP0453460B1 (en) 1993-02-03
JPH04505627A (en) 1992-10-01
DE59000852D1 (en) 1993-03-18
BR9007012A (en) 1991-11-12
WO1990008178A1 (en) 1990-07-26

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